Abstract
AbstractSamples of electrodialyzed kaolin, to which a known small quantity of alkali was added, were heated to temperatures in the range of room temperature to 1000°C. The state of combination of the alkali was studied by means of a microchemical reagent developed by Feigl. This reagent, a neutral saturated solution of nickel dimethylglyoxime, is color sensitive to OH ions. Results on various samples suggest the existence of at least one alkali‐kaolin compound and one alkali‐metakaolin compound.
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